Quadruple staying machine



Nov. 1, 1955 H. KELLER QUADRUPLE STAYING MACHINE 4 Sheets-Sheet 1 Filed July 18, 1951 IN VEN TOR.

H H RRY K ELLER F) T TOP/216V Nov. 1, 1955 H. KELLER QUADRUPLE STAYING MACHINE 4 Sheets-Sheet 2 Filed July 18, 1951 INIENTOR. HRRRY KELLER fir/w w DTTOQ UEV Nov. 1, 1955 H. KELLER 2,722,166

QUADRUPLE. STAYING MACHINE Filed July 18, 1951 4 Sheets-Sheet 4 "raw w a7 INVENTOR. Q H Y KELLER 66 a: MK

United States Patent QUADRUPLE STAYING MACHINE Harry Keller, Philadelphia, Pa.

Application July 18, 1951, Serial No. 237,392

9 Claims. (Cl. 93-41) This invention relates generally to box making machines of the type which incorporate pressing and/or stripping devices and is more particularly concerned with and directed toward a construction affording particular advantage as to the functioning of such devices.

Box making machines which receive blanks that have been cornered and scored for folding, form the box and then apply stays at the corners thereof are well known to the art. But, these known machines generally are provided with pressing devices designed only for applying stays to boxes having outer walls normal to the bottom thereof. Consequently, they have not proved to be entirely satisfactory because it is impossible to utilize them in applying stays to boxes whose walls are inclined divergently from the bottom upward, so that the box presents the form of the frustrum of a solid when stays have been provided at its several inclined upright joints. In addition, the devices with which these known machines are provided for stripping the formed boxes from the forming block generally are unduly complicated or are not substantially positive in the performance of their function. Accordingly, an object of this invention is to provide a box-making machine with a pressing device adapted to apply stays to the corners of boxes whose walls are inclined divergently from the bottom upward.

Another object of this invention is to provide a boxmaking machine with a pressing device comprising a presser bar and a presser head, the latter being carried by the former for selective angular adjustment relative thereto to accommodate application of stays to the corners of boxes whose walls are inclined to varying degrees of divergence from the bottom upward.

Still another object of this invention is to provide a box-making machine with a pressing device comprising a presser bar and a presser head, the latter being carried by the former and being automatically adjustable as to angular disposition relative thereto for accommodating application of stays to the corners of boxes whose walls are inclined to varying degrees of divergence from the bottom upward.

Another object of this invention is to provide a boxmaking machine with simplified, positive means for stripping formed and stayed boxes from the forming block.

The foregoing and other objects and advantages inherent in an apparatus embodying the invention will become readily apparent from a consideration of the following disclosure of illustrative embodiments. And, accordingly, the present invention may be considered as comprising the various features of construction and/or combination hereinafter more particularly pointed out in the detailed description and appended claims, reference being had to the accompanying drawings in which:

Fig. 1 is a side elevation of a box-making machine incorporating the present invention.

Fig. 2 is a plan section on line 22 of Fig. 1, certain parts being omitted for the sake of clarity and the presser devices being shown in a retracted position.

Fig. 3 is a view on line 4-4 of Fig. 2 showing the 2,722,166 Patented Nov. 1, 1955 pressing device in a retracted position and the stay material in position to be cut.

Fig. 4 is similar to Fig. 3 but shows the pressing device in an intermediate position and the stay material cut to proper length. t

Fig. 5 is a view on line 55 of Fig. 7 showing the pressing device in fully extended position for pressing a stay in place.

Fig. 6 is a perspective view of one form of pressing device.

Fig. 7 is a plan view of a corner block, the presser device being shown in fully extended position.

Fig. 8 is an enlarged plan view of the area encircled in Fig. 2 and designated A, the presser head being shown in the position corresponding to that shown in Fig. 4.

Fig. 9 is similar to Fig. 5 but shows a modified form of the pressing device.

Fig. 10 is a side elevation of the modified form of pressing device shown in Fig. 9, part being shown in section.

Fig. 11 is a section on line 11-11 of Fig. 13.

Fig. 12 is a partial side elevation of still another form of pressing device showing the head thereof set at an angle relative to the presser bar and the cutting element carried by the presser head adjusted for coaction with the cutting element carried by the corner block.

Fig. 13 is similar to Fig. 12 but shows the presser head normal to the presser bar and the cutter element carried by the presser head adjusted accordingly.

Fig. 14 is a plan section on line 14-14 of Fig. 13.

Fig. 15 shows a box blank which has been cornered and scored for folding.

Fig. 16 is a perspective view of a box formed from the box blank shown in Fig. 15 and shows stays applied to the corners thereof.

Fig. 17 is a partial vertical section showing the stripper device of the present invention, the stripper blade being disposed in elevated position and the forming block (full lines) being disposed in an intermediate position.

Fig. 18 is similar to Fig. 17, but the stripper blade (full lines) is disposed to engage a fully formed and stayed box.

Fig. 19 is similar to Fig. 17 but the stripper blade is disposed in its lowermost position, the box having been stripped from the forming block, which is shown in elevated position.

Fig. 20 is a plan section on line 2020 of Fig. 18.

The present invention is concerned principally with improvements in the well known Kingsbury and Davis paper box machine of U. S. Letters Patent No. 655,434, dated August 7, 1900; No. 728,086, dated May 12, 1903; and No. 2,082,365, dated June 1, 1937, to which documents reference may be had for the description and operation of all parts not specifically covered herein.

Referring particularly to Figs. 3 to 6, the presser device shown comprises an elongated presser bar 1 which is rectangular in transverse cross section. One end portion thereof has a pair of recesses on opposite sides thereof forming a centrally disposed part 2 having a pair of parallel vertical sides. An elongated presser head 4, preferably formed of stock which is generally rectangular in transverse cross section, has an open channel 6 formed therein centrally in the rear face thereof.

The channel has a pair of parallel sidewalls and extends from the lower extremity of presser head 4 to an intermediate portion thereof. Part 2 is disposed in channel 6 and the parallel sides of the former fit snugly against the parallel sidewalls of the latter. Opposed portions of the aforementioned sidewalls and a corresponding portion of part 2 have aligned openings formed therein which receive a pin 8. The opposite end portions of pin 8 are fixed in the sidewalls of channel 6, but the inter- I mediate portion thereof turns freely in the opening in part 2 for pivotal movement of presser head 4 about the transverse axis thereof. End Wall 9 of channel 6 and bottom 11 thereof are set back from part 2', and the upper end corner of part 2 is rounded off as at 12,. all for the purpose of accommodating the aforementioned pivotal movement. The recesses on opposite sides of presser bar 1 which form part 2 also form a pair: of similar shoulders. The latter present angularly related surfaces 14 and 16 disposed to abut the rear face of presser head 4 for affording stop means limiting pivotal movement thereof in either direction. A post 17 is integrally formed with presser bar 1 and projects upward therefrom in spaced relation to presser head 4. An intermediate portion of the face of post 17 opposite to presser head 4 presents a centering member 18 which mounts a spiral spring 19 acting horizontally against presser head 4 to resist the aforementioned pivotal movement. The upper end portion of presser head 4 mounts a cutter element 21 which is rigidly secured in place as by a screw 22 and pins 23. The forward face of presser head 4, and cutter element 21 are provided with a centrally disposed right angled groove 24 running the entire length of presser head 4.

Now referring particularly to Figs. 9 and 10, which illustrate a different form of presser device, it will be seen that 26 is an elongated presser bar which is rectangular in transverse cross section. An elongated presser head 27, preferably formed of stock which is generally rectangular in transverse cross section, is rigidly secured in any known manner intermediate its ends to an end portion of presser bar 26 and is disposed thereby in an inclined portion relative to the longitudinal axis thereof. The upper end portion of presser head 27 mounts a cutter element 28 which is rigidly secured in place in a manner similar to that for securing cutter element 21, being disposed thereby in a horizontal plane. The face of presser head 27 remote from presser bar 26, and cutter element 28 are provided with a centrally disposed right angled groove 29 running the entire length of presser head 27.

Now referring particularly to Figs. 11 to 14, which illustrate still another form of presser device, it will be seen that 31 is an elongated presser bar which is rectangular in transverse cross section. One end portion thereof has a recess therein forming a part 32 disposed to one side thereof. An elongated presser head 33, preferably made of stock which is generally rectangular in transverse cross section, has a part 34 projecting outward on one side thereof from an intermediate portion. The inner faces of parts 32 and 34 abut one another, and opposed portions thereof have aligned openings formed therein which receive a pivot bolt 36 disposed thereby for pivotal movement of presser head 33 about a horizontal axis. The aforementioned inner faces are radially serrated as at 37 to afford positive resistance to any undesired angular change in the relation of presser head 33 to presser bar 31, and the head and nut of pivot bolt 36 are received, respectively, by depression 38 formed in part 32 and depression 39 formed in part 34. The upper end corner 41 of presser bar 31 is set back from the opposite face of presser head 33 to accommodate pivotal movement of the latter in one direction about the axis of bolt 36, and the lower end portion of part 32 is shouldered as at 42 for engaging the aforementioned opposite face so as to limit pivotal movement of presser head 33 in the other direction. The upper end portion of presser head 33 has a pair of recesses on opposite sides thereof forming a centrally disposed part 43 having a pair of parallel vertical sides. The cutter element 46 includes a pair of members 47 rigidly terminally united therewith and depending therefrom in parallel spaced relation on opposite sides of part 43'. Opposed portions of members 47 and a corresponding portion .of part 43 have aligned openings formed therein which receive a bolt 48 disposed horizontally thereby. The intermediate portion of bolt 48 engages the opening in part 43, which is round, and which does not allow a substantial amount of play. The opposite end portions of bolt 48 engage the openings in members 47, which are elongated and arcuated in form for pivotal movement of cutter element 46 about the forward edge thereof, as shown in Fig. 12. The face of presser head 33 remote from presser bar 31, and cutter element 46 are provided with a centrally disposed right angled groove 50 running the entire length of presser head 33.

Now referring particularly to Figs. 17 to 20, rock shaft 49 mounts a presser bar actuating lever 51 which is generally vertically disposed thereby, and which is rocked toward and away from forming block 53. A stripping device 52 is mounted on the frame of the machine between lever 51 and forming block 53. Bracket 54 is rigidly adjustably secured by bolt 56, which engages an elongated opening 55 in the base of the bracket, to a portion 57 of the machine frame. The bracket has. a pair of arms 58 projecting upward from the base thereof in parallel spaced relation to one another, and opposed portions thereof have aligned openings formed therein which receive opposite end portions of a pin 59 horizontally disposed thereby. An intermediate portion of pin 59 has a bell crank 61 mounted thereon for free pivotal movement thereof about a horizontal axis.

The bifurcated end of a link 62 is positioned to straddle one end of bell crank 61 and is connected therewith by a pin 63. The free end of link 62 is similarly connected by a pin 75 to the bifurcated end of an arm 64. The free end of arm 64 is slidably received by an opening formed in lever 51 and is adjustably secured in place by a threaded wing bolt 66. The free end of bell crank 61 has a broad stripping blade 65 secured thereto having an extreme end portion disposed for engaging a fully formed box.

Fig. 15 shows a box blank 67 which has been scored as at 68 and cornered as at 69 for forming a box whose walls are inclined divergently from the bottom upward, and Fig. 16 shows the formed and stayed box. It will be understood that in order to form a box such as that shown, the opposite sides of forming block 53 must be inclined divergently from the bottom upward, and that any corner edge of the block where two such sides come together will be upright and inclined, thus necessitating a special type of presser device for applying a stay to the outer walls of the inclined upright joint formed at such a corner.

As stated hereinabove, Figs. 3 to 6 show one form of my presser device. Fig. 3 shows the presser device in a retracted position. It will be understood, however, that the presser device may be retractedstill further for the proper feeding of stay material 70. The upper surface of cutter element 21 abuts the bottom surface of coacting cutter element 72 mounted as best shown in Fig. 8 on corner block 73, which aifords means for guiding movement of the pressure device. Stay material 70 is guided and fed into place through an opening 76 in cutter element 72 by means including member 71. As the presser device passes from the position shown in Fig. 3 to that shown in Fig. 4, the sliding movement of cutter element 21 causes a piece of stay material 70 to be cut off, thus forming a stay 74. During the aforementioned movement, presser head 4 tends to pivot about the axis of pin 8 against the action of spring 19. However, the force exerted by spring 19 and the abutting surfaces of cutter elements 21 and 72 prevent such pivotal movement. It will be understood that the timing of the machine is such that as the presser device passes from the position shown in Fig. 3 to that shown in Fig. 4, forming block 53 engages a box blank 67 and causes the marginal portions thereof to be folded along score lines 68 to form the sides of a.

box against the inclined sides of forming block 53,, as shown .in Fig. 4. Initial movement of the presser device from the position shown in Fig. 4 toward that shown in Fig. 5 causes the upper portion of presser head 4 to engage forming block 53 or a portion of the box formed thereon. Further movement of the presser device causes presser head 4 to pivot about the axis of pin 8 against the action of spring 19 so that the surfaces of groove 24 are brought into position for engaging or registering with the surfaces forming a corner of block 53. Since a corner of the box and stay 74 are interposed between forming block 53 and the presser device, the pressure exerted by the latter causes stay 74 to be applied to the outer walls of the inclined upright joint which forms the aforementioned corner. It will be noted that in Fig. 4 cutter elements 21 and 72 are positioned in spaced relation to forming block 53 so that in passing to the position shown in Fig. 5 a portion of cutter element 21 passes from under cutter element 72 for accommodating the aforementioned pivotal movement of presser head 4. In addition, it will be noted that pin 8 is positioned in spaced relation to the rear face of presser head 4 so that the edge of cutter element 21 aligned with the aforementioned face moves downward relative to the under surface of cutter element '72 as a result of the aforementioned pivotal movement of presser head 4 to accommodate return of the presser device to retracted position after application of stay 74 thereby. It should be obvious that the presser device just described automatically adjusts itself to the particular inclination of the upright joint to be stayed thereby.

Operation of the presser device shown in Figs. 9 and 10 should be obvious. The surfaces of groove 29 are initially positioned for engaging or registering with the surfaces forming a corner of block 53. As the presser device passes from its retracted position corresponding to that shown in Fig. 3 to an intermediate position corresponding to that shown in Fig. 4, a piece of stay material 7 0 is cut off by cutter elements 28 and 72. Further movement of the presser device causes stay 74 to be applied to the outer walls of the inclined upright box joint. It will be noted that a presser device of this type is adapted for applying stays to corners of boxes whose outer walls have a degree of inclination corresponding to that of presser head 27. The presser device must be replaced by another when the degree of inclination changes materially.

Operation of the remaining form of presser device shown in Figs. 11 to 14 also should be obvious. The surfaces of groove 50 are selectively positionable for engaging or registering with the surfaces forming a corner of block 53 by the simple expedient of loosening bolt 36 in order to disengage serrations 37, adjusting presser head 33 to a desired position, and then drawing bolt 36 tight again. Cutter element 46 must also be adjusted so that the upper surface thereof abuts the lower surface of cutter element 72. This adjustment is aflorded by loosening bolt 48, moving cutter element 46 to the desired position, and then drawing the bolt tight again. It will be noted that this form of presser device can be manually adjusted to the inclination of the upright joint to be stayed thereby. Otherwise operation of this form of presser device is the same as the operation of the form of presser device shown in Figs. 9 and 10.

The stripping blades 65 of stripping device 52 passes from the position shown in Fig. 17, through the position shown in Fig. 18 to that shown in Fig. 19 as the upper end of lever 51 rocks toward forming block 53 for actuating the presser devices. It is actuated in an obvious manner by pivotal movement of hell crank 61, which is operatively connected with lever 51 through link 62 and arm 64, the latter being secured to arm 51. Bracket 51 may be positioned so that the edge of blade 65 positively engages the fully formed and stayed box, as shown in Fig. 18, by reason of the bolt 56 and slot 55 connective of the bracket to the frame of the machine. It will be understood that arm 64 is adjustable in lever 51 to afford a selected range of swinging movement of blade 65 and to permit positioning of bracket 54 for accommodating boxes of different sizes. The timing of the machine is such that blade 65 clears forming block 53 as the latter passes from the dotted line position to the full line position shown in Fig. 17. Continued movement of forming block 53 brings it to the full line position shown in Fig. 18, the box being fully formed and stayed in such position. In the meantime, initial swinging movement downward of blade 65 causes the edge thereof to positively engage the upper edge of the box. Continued swinging movement downward of blade 65 and initial movement upward of forming block 53 causes the box to be disengaged or stripped from the latter, as shown in Fig. 19.

It should be obvious now that a box-making machine has been provided which is adapted to apply stays to the corners of boxes whose walls are inclined divergently from the bottom upward. It should also be obvious that in certain forms of the machine the necessary adjustments for making boxes with sides whose walls are inclined to varying degrees may be made either manually or automatically. Furthermore, it should be obvious that such a machine has been provided with a stripping device which is simple in construction and positive in action.

Although the apparatus herein disclosed as embodying the invention has particular utility in the manufacture of paper boxes, certain features are of more general application and it is not intended to limit the invention to the exact construction and combinations herein shown and described for the purposes of illustrations as various modifications within the scope of the appended claims may occur to those skilled in the art.

What is claimed as new and useful is:

1. In combination with a machine for making a box from a blank which has been cornered and scored for folding, said machine including a frame structure and a forming element carried thereby and mounted for movement between an initial position and a final position wherein said blank is folded to form a box, the surfaces of said forming element against which the walls of said box are formed and the walls of said box thus formed being inclined divergently from the bottom upward, a pressing device comprising an elongated presser bar carried by said frame and mounted for movement toward and away from said forming element along a line passing generally diagonally through a corner thereof, and a presser head carried by said presser bar for pivotal move ment relative thereto and having a groove formed therein presenting angularly related surfaces, yieldable means reacting against said presser bar and presser head for resisting said pivotal movement, said presser head being disposed in opposed spaced relation to said corner as said forming element approaches said final position, and means for actuating said forming element and pressing device and urging said presser head toward said corner so that pressure thereagainst aflords pivotal movement of said presser head against force exerted by said yieldable means, said pivotal movement positioning said angularly related surfaces for registration with the surfaces forming said corner and for applying a stay to the outer walls of the inclined upright box joint formed at said corner.

2. In combination with a machine for making a box from a blank which has been cornered and scored for folding, said machine including a frame structure and a forming element carried thereby and mounted for movement between an initial position and a final position wherein said blank is folded to form a box, the surfaces of said forming element against which the walls of said box are formed and the walls of said box thus formed being inclined divergently from the bottom upward, a pressing device comprising an elongated presser bar carried by said frame and mounted for movement toward and away from said forming element along a line passing generally diagonally through a corner thereof, and an elongated presser head connected intermediate its ends with an end portion of said presser bar for pivotal movement relative thereto and having a groove formed therein lengthwise thereof presenting angularly related surfaces, spring means carried by said presser bar and reacting against said presser head for resisting said pivotal movement in one direction, stop means for limiting said pivotal movement in the other direction, said presser head being disposed in opposed spaced relation to said corner as said forming element approaches said final position, and means for actuating said forming element and pressing device and urging said presser head toward said corner so that pressure thereagainst affords pivotal movement of said presser head against force exerted by said spring means, said pivotal movement positioning said angularly related surfaces for registration with the surfaces forming said corner and for applying a stay to the outer Walls of the inclined upright box joint formed at said corner.

3. In combination with a machine for making a box from a blank which has been cornered and scored for folding, said machine including a frame structure and a forming element carried thereby and mounted for movement between an initial position and a final position wherein said blank is folded to form a box, the surfaces of said forming element against which the walls of said box are formed and the walls of said box thus formed being inclined divergently from the bottom upward, a pressing device comprising an elongated presser bar carried by said frame and mounted for movement toward and away from said forming element along a line passing generally diagonally through a corner thereof, and a presser head carried by said presser bar for pivotal movement relative thereto and having a groove formed therein presenting angularly related surfaces, yieldable means reacting against said presser bar and presser head for resist-ing said pivotal movement, said presser head being disposed in opposed spaced relation to said corner as said forming element approaches said final position, and means for actuating said forming element and pressing device and urging said presser head toward said corner so that pressure thereagainst afiords pivotal movement of said presser head against force exerted by said yieldable means, said presser head being thereby automatically positioned with said angularly related surfaces in registry with the surfaces forming said corner and for applying a stay to the outer walls of the particular inclined upright box joint formed at said corner.

4. In a box-making machine of the character described, in combination: means for forming a flanged box including a reciprocable forming member, coacting means for turning up the box flanges against the sides of said forming member during movement of said forming member in one direction, and means for staying the box flanges when thus positioned against the sides of the forming member; and means for stripping the formed box from said forming member including means mounted for movement in said one box-forming direction to register with said box when said forming member is in the region of the limit of its movement in box-forming direction, and actuating means for said stripping means for moving said stripping means as afore-stated into registry with said box and for thereafter continuing movement of said stripping means in the same direction through a distance at least sufiicient for separating said box from said forming member.

5. In a box-making machine of the character described, in combination: means for forming a flanged box including a reciprocable forming member, coacting means for turning up the box flanges against the sides of said forming member as the latter moves in one direction, and means. for staying the box flanges when thus positioned against the sides of the forming member; and means for stripping the formed box from said forming member including means mounted for swinging movement in a plane substantially parallel with the line of forming member reciprocation, and actuating means therefor operating to swing said last-mentioned means in substantially said one direction into registry with said box as said forming member reaches the limit of its movement in said; one. direction andto thereafter continue to swing the same meansin substantially said one direction in contact, with said box for sweeping. the same from said forming element as the direction of movement of the latter is reversed;

6. In a box-making machine of the character described, in combination: means for forming a flanged box including a vertically reciprocable forming member, coacting means for turning up the box flanges against the sides of said forming member as the latter moves downwardly, and means for staying the box flanges when thus positioned against the sides of the forming member; and means for stripping the formed box from said forming member including at least one pivotally mounted member having a free end portion movable in a vertically extending arcuate path proximate said forming member, and means to actuate said pivotally mounted member for moving said free end portion downwardly in said arcuate path to register with said box as said forming member approaches the limit of its downward movement and to thereafter continue moving downwardly in said arcuate path in contact with said box for sweeping the same from said forming element as the latter reverses the direction 1 of its movement, and for then moving said free end portion upwardly in said arcuate path to position the same out of the path of said forming member preliminarily to the next succeeding downward thrust of said forming member.

7. The combination of claim 1, and further including a cutting means on the presser head adapted to cooperate with a stay strip feeding means for severing a stay therefrom during the stated movement of the pressing device toward the forming element but prior to contact of said presser head with the box carried by the forming element.

8. The combination of claim 2, and further including a cutting means on the presser head adapted to cooperate with a stay strip feeding means for severing a stay therefrom during the stated movement of the pressing device toward the forming element but prior to contact of said presser head with the box carried by the forming element.

9. The combination of claim 3, and further including a cutting means on the presser head adapted to cooperate with a stay strip feeding means for severing a stay therefrom during the stated movement of the pressing device toward the forming element but prior to contact of said presser head with the box carried by the forming element.

References Cited in the file of this patent UNITED STATES 'PATENTS 728,086 Davis et a1. May 12, 1903 1,131,199 Bird Mar. 9, 1915 1,154,969 Burnham Sept. 28, 1915 1,965,274 Zanetti July 3, 1934 1,988,814 Silby Jan. 22,1935 2,082,365 Straw et a1. June 1, 1937 2,321,562 Coy et a1. June 8, 1943 

